After separation from the SLA (by about 50-100 feet), the CSM "turned around" and docked with the LM to pull it out. This turning around was done by a 180 degree change in orientation. This could have been done by using the "YAW" or the "PITCH" function. I understand this was done by change in "PITCH" and not YAW. Is there any specific reason for using the PITCH function or it was left to crew?